120443665 has 4 divisors (see below), whose sum is σ = 144532404. Its totient is φ = 96354928.

The previous prime is 120443647. The next prime is 120443669. The reversal of 120443665 is 566344021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566344021 = 6977 ⋅81173.

It can be written as a sum of positive squares in 2 ways, for example, as 17380561 + 103063104 = 4169^2 + 10152^2 .

It is a cyclic number.

It is not a de Polignac number, because 120443665 - 2⁷ = 120443537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120443669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12044362 + ... + 12044371.

It is an arithmetic number, because the mean of its divisors is an integer number (36133101).

Almost surely, 2^120443665 is an apocalyptic number.

It is an amenable number.

120443665 is a deficient number, since it is larger than the sum of its proper divisors (24088739).

120443665 is an equidigital number, since it uses as much as digits as its factorization.

120443665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24088738.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 120443665 is about 10974.6829111369. The cubic root of 120443665 is about 493.8495405785.

Adding to 120443665 its reverse (566344021), we get a palindrome (686787686).

The spelling of 120443665 in words is "one hundred twenty million, four hundred forty-three thousand, six hundred sixty-five".